/Engine/Source/Runtime/GeometryCore/Public/CompGeom/Delaunay2.h
Triangulate a polygon, and optionally pass back the resulting triangles Uses a winding-number-based fill mode, and relies on the general polygon having correct orientations (UsesTGeneralPolygon2's OuterIsClockwise() to automatically choose between positive or negative winding) Note: TrianglesOut may be empty or incomplete if the input is self-intersecting. Note this clears any previously-held triangulation data, and triangulates the passed-in general polygon from scratch
template<typename RealType> bool Triangulate ( const [TGeneralPolygon2](API\Runtime\GeometryCore\CompGeom\TGeneralPolygon2)< RealType > & GeneralPolygon, [TArray](API\Runtime\Core\Containers\TArray)< [FIndex3i](API\Runtime\GeometryCore\FIndex3i) > * TrianglesOut, [TArray](API\Runtime\Core\Containers\TArray)< [TVector2](API\Runtime\Core\Math\TVector2)< RealType >> * VerticesOut, bool bFallbackToGeneralizedWinding )